CN1076913A - Process for producing aluminium sulfate from bauxite - Google Patents
Process for producing aluminium sulfate from bauxite Download PDFInfo
- Publication number
- CN1076913A CN1076913A CN92106653.8A CN92106653A CN1076913A CN 1076913 A CN1076913 A CN 1076913A CN 92106653 A CN92106653 A CN 92106653A CN 1076913 A CN1076913 A CN 1076913A
- Authority
- CN
- China
- Prior art keywords
- reaction
- technology according
- pot
- sulfuric acid
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000329 aluminium sulfate Inorganic materials 0.000 title claims abstract description 7
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 title claims abstract description 7
- 235000011128 aluminium sulphate Nutrition 0.000 title claims abstract description 7
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 4
- 230000008025 crystallization Effects 0.000 claims abstract description 4
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004904 shortening Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 238000003892 spreading Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A process for preparing aluminium sulfate from bauxite includes such steps as preparing raw materials, loading in pot, reaction, discharging from pot, deposition, neutralization, evaporation and crystallization.
The process has the advantages of reasonable flow, simple operation and control, no normal pressure reaction stage, preheating of the bottom-spreading liquid, high temperature rise and pressure rise speed, great shortening of the production period, high temperature, contribution to improvement of the dissolution rate of alumina and reduction of the consumption of sulfuric acid.
Description
The invention belongs to chemical technology field, relate to a kind of improvement of using bauxite to produce aluminium sulfate technology.
In the prior art, utilize the technology of using bauxite to produce aluminium sulfate, its aluminium vanadine and the reaction process of sulfuric acid in reactor, usually divide synthesis under normal pressure, booster reaction and constant voltage reaction three phases, time in synthesis under normal pressure stage generally reaches 70 minutes, the vent valve of reactor is in open mode, the first heat of dilution and reaction heat major part are discharged, be not fully utilized, cause temperature low, speed of response is slow, has extended the production cycle, top temperature during constant voltage reaction by the time simultaneously also can only reach 161 ℃, is unfavorable for improving the solubility rate of aluminum oxide; It two is part So
2, So
3Gas is also run away thereupon, has increased the vitriolic consumption; In addition also will not be hot to shop fixtures liquid, the reaction initial temperature is low.
Task of the present invention is in order to overcome the above-mentioned shortcoming of existing technology, and a kind of novel process of using bauxite to produce aluminium sulfate is provided, and shortens the production cycle to reach, and increases the solubility rate of aluminum oxide, enhances productivity, and can reduce the purpose of sulfuric acid consumption simultaneously again.
Task of the present invention realizes with following technical scheme, its technical process comprises raw material preparation, dress pot, reacts, puts pot, sedimentation, neutralization, evaporative crystallization, its main points are that an aluminium vanadine and a vitriolic reaction branch boost and constant voltage two stages of reaction, have omitted the synthesis under normal pressure stage.
In the flow process said booster reaction be after dress pot adds sulfuric acid immediately the vent valve of off-response still directly carry out, reach peak pressure 0.32MPa up to reaction, omitted the synthesis under normal pressure stage.Owing to close vent valve immediately after adding sulfuric acid, avoided the So of the heat of dilution, reaction heat and generation
2, So
3The gas purging loss, the reaction initial temperature generally can reach 117～118 ℃, and is higher 3～5 ℃ than former technology, it is fast to heat up, boost, and the reaction times generally about 60 minutes, shortens about 80 minutes than former technology, improve production efficiency greatly, also reduced the vitriolic consumption simultaneously.
Said raw material is prepared, adorned pot, constant voltage reaction, puts pot, sedimentation, neutralization, evaporative crystallization in the flow process, adopts routine operation, and is identical with former technology.
In order further to improve the reaction initial temperature, accelerate the booster reaction process, raw material in the said flow process is prepared, except that carrying out routine operation, also shop fixtures liquid is given heat, give heat and can adopt steam heating, giving hot temperature can be at 60～90 ℃, with 70～80 ℃ comparatively suitable, so both can reach the purpose that improves the reaction initial temperature, accelerates reaction process, help reducing fuel consumption again.
Booster reaction closes on when finishing, reaction reaches a climax, and pressure rises express, changes the operation control of constant voltage reaction over to for ease of booster reaction, when pressure reaches 0.30～0.31MPa, the air valve that can gently begin to rehearse, exhaust is slightly slowly risen the still internal pressure, prevent from rapidly to reach top pressure 0.32MPa, cause row's gas carrying liquid, even rupture disk breaks, cause damage.
Technical process of the present invention is reasonable, and operation control is simple, heats up, the rate of rise is fast, improved production efficiency, and the sulfuric acid consumption is low simultaneously, the solubility rate height of aluminum oxide.
The present invention adopts the reactor of 7 tons of throughput to test, embodiment one: end liquid is the mixed solution of two, three times liquid, 46 ℃ of temperature, after adding sulfuric acid, the dress pot closes vent valve immediately, other same routine operations, and the reaction initial temperature is 114 ℃, 70 minutes still internal pressures are 0.32MPa, reach the 0.32MPa time than former technology and shorten 70 minutes, 165 ℃ of top temperatures improve 4 ℃ than former technology.
Embodiment two: shop fixtures liquid adopts the mixed solution of two, three times liquid, earlier give heat with steam, temperature is 70 ℃, operation is with embodiment one, and the reaction initial temperature is 119 ℃, improves about 5 ℃ than former technology, the still internal pressure reached 0.32MPa in 60 minutes, than former process time shortening 80 minutes, 165.5 ℃ of top temperatures improved 4.5 ℃ than former technology.
Claims (5)
1, a kind of technique using bauxite to produce aluminium sulfate, technical process comprise raw material preparation, dress pot, react, put pot, sedimentation, neutralization, evaporative crystallization, it is characterized in that an aluminium vanadine and vitriolic reaction deciliter reaction and constant voltage two stages of reaction.
2, technology according to claim 1 is characterized in that said booster reaction, is that the vent valve of off-response still directly carries out immediately after last process dress pot adds sulfuric acid, until reaching reaction peak pressure 0.32MPa.
3, technology according to claim 1 is characterized in that said booster reaction, is after last process dress pot adds sulfuric acid, the vent valve of off-response still directly carries out immediately, when treating that pressure reaches 0.30-0.31MPa, the air valve that gently begins to rehearse makes pressure reach maximum reaction pressure 0.32MPa at a slow speed.
4, technology according to claim 1 is characterized in that said raw material preparation, except that carrying out routine operation, also shop fixtures liquid is given heat.
5, technology according to claim 3 is characterized in that the said heat of giving is to give being heated to 60～90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92106653.8A CN1076913A (en) | 1992-08-05 | 1992-08-05 | Process for producing aluminium sulfate from bauxite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92106653.8A CN1076913A (en) | 1992-08-05 | 1992-08-05 | Process for producing aluminium sulfate from bauxite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1076913A true CN1076913A (en) | 1993-10-06 |
Family
ID=4942304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92106653.8A Pending CN1076913A (en) | 1992-08-05 | 1992-08-05 | Process for producing aluminium sulfate from bauxite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076913A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034922C (en) * | 1994-01-12 | 1997-05-21 | 陈家盛 | Complex aluminate "PAS" and its production process |
| CN1070823C (en) * | 1998-06-14 | 2001-09-12 | 新疆工学院 | Selective dissolving process for preparing aluminium sulfate |
-
1992
- 1992-08-05 CN CN92106653.8A patent/CN1076913A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034922C (en) * | 1994-01-12 | 1997-05-21 | 陈家盛 | Complex aluminate "PAS" and its production process |
| CN1070823C (en) * | 1998-06-14 | 2001-09-12 | 新疆工学院 | Selective dissolving process for preparing aluminium sulfate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |